I was re-reading my Winter Soldier arc comics and there are two other plausible roles these actors (Coster-Waldau and Holloway) could have been cast in: Jack Monroe or Neal Tapper. Both are smaller parts, but they fit physically.

I am more and more convinced the outline of the movie is going to mirror this arc. It is SO cinematic, with some really great character stuff. *fingers crossed for a great movie*

Coster-Waldu is a Danish actor (who can pull-off a British accent) it would make sense he'd take on a Strucker/Zemo.. along with Game of Thrones he played a solid villain in HEADHUNTERS